Commercial Lighting Procurement Checklist: 6 Steps Before You Swap Metal Halide for Smart Control

I'm the procurement manager at a 240-person facilities services company. I've owned our lighting and electrical budget — $186,000 in 2024 alone — for the past seven years, negotiated with 40+ vendors, and logged every purchase order in our system since 2018. I've made enough lighting mistakes to know which steps actually protect the budget and which ones just look like they do.

This is the checklist I run before any commercial lighting replacement. Metal halide to LED, one fixture to a whole floor, single spot or building-wide control. Six steps. Skip one and you'll usually pay for it twice.

Step 1: Inventory What You Actually Have Before You Price Anything

The most expensive mistake is quoting the wrong fixture. I've watched contractors walk a building, eyeball forty aging fixtures, and walk off with a number that's 30% wrong by the time the spec is verified.

Start with a room-by-room count. For each fixture, log the fixture type, lamp type, wattage, ballast type, and whether the housing is still structurally sound. If you're running legacy GE Lighting metal halide lights — the Multi-Vapor and PulseArc families are still everywhere in warehouses, parking structures, and older gyms — write down the ANSI lamp code printed on the lamp base. That six-character code is the single most important thing you can capture on day one.

Here's what I've learned about metal halide over the years: the sticker price looks reasonable. A GE Lighting metal halide lamp runs $30–$45 per unit depending on wattage. But these lamps drift in color temperature as they age, take three to five minutes to reach full brightness, and lose roughly 30% of their lumen output before they die. For a 24/7 parking deck that runs 8,000+ hours a year, you're replacing lamps every 12–18 months and paying a lift rental each time.

Step 2: Lock the Exact Part Number — Never Accept 'Equivalent'

This one cost me $1,200 and a very awkward Monday morning.

When you order replacement product for an existing fixture, use the exact manufacturer part number, not a category description. If it's a GE Lighting 66249 metal halide lamp you're replacing, the order should read GE Lighting 66249, not '400W metal halide, cool white.' Suppliers fill category descriptions with whatever's in the nearest bin. I've had jobs where 'equivalent' meant a 4000K lamp instead of a 3000K lamp, and the complaint came from two offices away before lunch.

After that hit, I built a simple cross-reference sheet. Manufacturer part number, ANSI code, CCT, CRI, lumen output, lifespan, and the date we verified it. Every order I place now cites that sheet. Sounds bureaucratic. Takes fifteen minutes. Saves weeks of rework.

Step 3: Decide What Stays, What Gets Re-Lamped, and What Comes Out

Not every fixture deserves the same decision. This is where I see facilities teams undercount the real cost — they apply one strategy to the whole building.

Three categories, honestly sorted:

• Functional fixtures (warehouse, parking, industrial): replace with LED and don't look back. The ROI is measurable in 18–30 months.
• Decorative or feature fixtures: this is where you need to be careful. A metal chandelier in a hotel lobby or corporate reception might have good bones — the housing, glass, and finish are all fine, and only the lamp socket is dated. A retrofit kit ($80–$200 per fixture depending on size) preserves the fixture and often beats a full replacement by 40–60%.
• Mixed-use areas: conference rooms and executive offices are the hardest. If a fixture is vintage, custom, or architecturally specified, replacement cost multiplies fast. Be honest here — sometimes retrofitting is right, sometimes you're polishing a bad design.

If the decorative fixture is going to be replaced anyway, compare replacement against retrofit on TCO, not unit price. A $1,900 metal chandelier that needs one seamless retrofit is often cheaper than a $900 LED replacement once you factor in removal, disposal, ceiling repair, and design sign-off.

Step 4: Get the Control Wiring Right Before You Buy a Single Smart Device

This is the step that most often turns a clean project into an unbudgeted one.

You need to understand line vs load at every switch location — and for that matter, at every module, dimmer, and controller. The line terminal is the incoming hot wire from the panel. The load terminal feeds the fixture. They are not interchangeable, and if a contractor mixes them at one location, the switch can appear to work and then fail intermittently at the worst possible moment.

More importantly for anything smart: verify that the switch box has a neutral wire before you buy any smart switch or app-controlled spotlight. Older commercial buildings — especially anything wired before the mid-1990s — frequently have what's called a switch loop, where the hot wire returns on the load instead of a neutral. In my experience, roughly one in three retrofit switch boxes on pre-2000 buildings doesn't have a usable neutral.

If you're evaluating an app spotlight or any networked fixture using Zigbee or Wi-Fi, add two checks to your spec sheet: neutral wire presence at the switch box, and signal strength in the intended location. A smart fixture that loses its network drops back to manual mode, which defeats the entire reason you bought it.

Step 5: Price the TCO, Not the Unit

I've run this comparison dozens of times, and the numbers almost always change the conversation.

Take a single 400W metal halide fixture. Lamp cost around $40. Ballast replacement every 4–5 years, around $90. Annual lamp replacement on a heavy-duty cycle, plus lift rental, plus labor — call it $85 per cycle. Over five years, that's roughly $40 + $85 × 4 + $90 = around $470 per fixture just to keep the light on.

A direct LED replacement lamp of comparable output runs $60–$90. Over the same five years, add maybe one $90 ballast bypass if you go that route instead of direct replacement, and zero lamp changes. Total: roughly $150–$180. The gap is 2.5x to 3x. That's a real number, not a pitch.

But be honest with yourself: if a fixture runs 200 hours a year in a rarely used area, the savings shrink dramatically. Retrofit for reliability and maintenance reduction, not for energy — and say so out loud. Chasing ROI on a barely used closet is how procurement teams lose credibility. If the numbers don't justify it, don't force it.

Step 6: Phase the Rollout — One Zone, Then Scale

Never swap an entire facility in one purchase order. Pick one zone — a warehouse aisle, one floor, one parking section — and run it for 60 days. Then measure three things: maintenance tickets, complaints, and actual energy delta against your baseline.

The 60-day window will surface every problem you didn't plan for. A fixture that flickers because of a bad dimmer. A smart module that keeps dropping off. A neutral wire that was missing at the third switch on the hallway circuit.

Fixing those issues in a $4,200 pilot is a Tuesday. Fixing them at 300-unit scale is a quarterly budget variance I have to explain to my CFO. I'd rather pilot.

What Goes Wrong — and How to Avoid It

Spec creep at the supplier. If you don't cite part numbers, the supplier will substitute. Every time. Hold the line on SKU-level specs, or you'll get whatever they had in stock that month.

Missing neutral wires. Confirm in writing — from an electrician, not a supply house — that every smart switch location has line, load, and neutral available. Anything less, and your install crew will discover it at 4 PM on a Friday.

Controlling smart fixtures with the wrong wall switch. A standard on-off switch can cut power to a smart spotlight or app spotlight entirely, which means it loses its programming and reconnects from scratch. If you're installing networked lighting, specify switches that are compatible with the fixture, not leftover stock from the side room.

Ignoring lamp-to-ballast compatibility. If you're going direct replacement LED on an existing metal halide ballast, verify the lamp is rated for that ballast type — pulse-start, probe-start, or electronic. A mismatched lamp will burn out early and the warranty claim won't stick.

Trusting 'free installation' pricing. There's no such thing. That phrase usually means setup and disposal are buried in the unit price, and disposal is the one line you actually want itemized — it's federally regulated in most jurisdictions. Get removal and disposal quoted separately so you can see what you're really paying.

Bottom line: the lighting project that goes smoothly isn't the cheapest one. It's the one where the inventory was accurate, the part numbers were locked, the wiring was checked before it was spec'd, and the rollout was piloted before it was scaled. That's not glamorous. But it's the only version that still looks good on the balance sheet twelve months later.